sharretts



(N0 ModeL) 2 SheetsSheet 1. D. E. SHARRETTS.

FOGUS'ING ATTACHMENT FOR'GAMER AS.

No. 606,394. Patented June 28,1898.

Witme 000 (No Model.)

2 SheetsSheet 2' D. E. SHARRETTS. FOGUSING ATTACHMENT FOR CAMERAS.

Patented June 28, 1898.

Unurnn Starts PATENT @rrrcn.

DAVID E. SIIARRETTS, OF \(VASIIINGTON, DISTRICT OF COLUMBIA ASSIGNCR OFONE IIALF TO CHARLES E. KLOEBER, JR, OF SAME PLACE.

FOCUSING ATTACHMENT FUR CAMERAS.

SPECIFICATION forming part of Letters Patent No. 606,394, dated June 28,1898.

Application filed October 28, 1897 T all whom, it may concern:

Be it known that I, DAVID E. SHARRETTS, a citizen of the United States,residing at WVashington, in the District of Columbia, have inventedcertain new and useful Improvements in Camera Attachments; and I dodeclare the following to be a full, clear, and exact description of theinvention,such as will enable others skilled in the art to which itappertains to make no and use the same, reference being had to theaccompanying drawings,and to the figures of reference marked thereon,which form a part of this specification. I

It has been common in the art of photogra- I 5 phy to use anerecting-reflector pivoted to the ground-glass frame, so as to allow thereflector to be tilted toward and from the ground glass for the purposeof varying the angle of deflection and making the image upon the groundglass appear in its natural and proper position.

The object of my invention is to so construct and arrange such pivotedreflector that it can not only be tilted, but so that its axis 2 5 canbe moved up or down across the face of the ground glass in order toallow a wider range of adjustment and by this means bring into view ofthe operator the portions of the image desired, as required by thevarying 3o quantity of light and shade thrown upon the differentsections of the ground glass, and to greatly facilitate the focusingoperation.

A further object of my device is to mount the reflector so that it willperform these f unctions whether turned into a horizontal or a verticalposition. I

In the drawings, Figure 1 represents a perspective view of my improvedreflector applied to an ordinary ground-glass frame arranged for takinghorizontal pictures. Dotted lines show the reflector adjusted to ahigher position and a different angle, as in the act of focusing. Fig. 2represents aperspective view of the reflector and groundglass frameturned around in position to observe a vertical image. Fig. 3 is aperspective view of the reflector and frames in vertical position tobetter illustrate their mechanism and to show their relation to eachother; and

Serial No. 656,652. (No model.)

Figs. at and 5 are detail views of the reflectorhangers the slides andtheir immediate parts adjusted to different positions.

The reference-numeral 1 denotes an ordinary ground-glass frame to whichmy improvements are applied. The reflector 2 is set in a frame 3, whichfor convenience will be termed a vertical frame, because it is used forerecting vertical pictures. This frame is set in and flush with an outerframe 4, which will be called a horizontal frame, because it is used fortaking such pictures. These two frames constitute a 'compound frameadapted to be moved as one on two pivots 5 at the lower corners of theframe 4. These pivots are set in sliding bearings 6, movable up and downbetween the guide-bars 7 and 8, the latter being fastened to theground-glass frame 1 by screws 9. In order to increase the friction ofthe bearings upon the guide-bars and thereby prevent them from slidingtoo freely, a leaf or plate spring 17 is interposed between the bearingsand the bars and acts as a brake. This spring is formed in the shape ofan arch, the crown of which is fastened to the bearing, and its oppositeends are bent out laterally to form runners, Which engage and slide overthe surface of the inner guide-bar 7.

The free end of the reflector-frame is ad- 3' ustably supported inangular relation to the ground glass by two flat metal hangers 12,having their outer ends pivotally attached to the opposite sides of theouter frame at and their inner ends pivotally attached to slidingrunners 13, the latter being provided with brake-springs 12 forproducing frictionlike those on the pivot-bearings 6. The frictionalpressure between these runners 13 and the guide-bars must be suflicientto prevent the weight of the free end of the tilted reflector and framefrom overcoming it, yet not be enough to prevent the runners fromsliding with facility when the operator oscillates the free end of theframe with his hand. By this means the frame can be tilted back andforth and slid up and down and will remain at any desired point ofadjustment without having to manipulate screws or other fastening devices. The foregoing description relates to the reflector and itsadjusting mechanism when used for horizontal pictures.

The means for taking vertical pictures will nowbe described. The innerframe 3 is pivoted in the outer frame i, and its pivots 13' operate insliding bearings 14:, which move between guide-bars 15 and 16 and areprovided with springs 17 for the purpose of holding them in closefrictional contact with the bars. As these bearin gs are exactly likethose for the outer or horizontal frame no further description will benecessary. Two flat metal hangers 18, also like those for the horizontalframe, with their outer ends pivotally attached to the opposite sides ofthe frame 3 and their inner ends to sliding runners 19, support the freeend of the frame at various points of angular adjustment in relation tothe ground glass in precisely the same manner in which the horizontalframe is supported. 130th frames are held closed by springcatches 20 and21, preferably located at the top of each.

Briefly the operation of my device is as follows: In taking a horizontalpicture the catch 20 is first released. The operator then pulls out thetop of the frame the required distance from the ground glass to permitthe erected object to be seen from above. A still liner adjustment ofthe object to the view can be had by raising or lowering the pivotalpoint of the frame. This can be done by sliding the pivot-bearings 0between the guide-bars 7 and 8 until the required point is reached.Afterward the frame may he slid down until the bearings reach the bottomof the groove between the guide-bars and then shut up flat against thegroundglass frame and so held by the catch 20.

If a vertical picture is to be taken, the whole ground-glass frame andthe compound reflector-frame are turned around into vertical position.The inner frame should now be released and its upper free end swung outon the pivots and oscillated back and forth or slid up or down to securethe required ad jus'tment to properly observe the image, the operationbeing exactly like that just described for taking horizontal pictures.The inner frame closes flush with the outer frame, and the two form acompact and. simple attaehment which lies flat against the back of. thegroi'ind-glass frame when out of use.

Having thus described my invention, what I claim as new, and desire toseen re by Letters Patent, is

1. In a camera attaclnnent, a ground glass frame having an oblongreflector provided with pivots disposed at right angles to each other,whereby either vertical or horizontal pictures may be erected,substantiall y as described.

23. In a camera attachment, a groi'nul-glass frame provided with acompound reflectorframe having pivots disposed at right angles to eachother whereby the reflector is capable of tilting horizontally orvertically, substantially as described.

3. In a camera attachment, the combiinttion with a ground-glass frame,of an oblong reflector pivoted in an inner frame, said reflectorhavingits pivots operating in an outer frame and said outer frame havingpivots disposed at right angles to those of the inner frame and confinedin sliding hearings on the ground-glass frame, substantially as described.

l. In a camera attachment, the combina tion with a ground glass, of areflector provided with movable pivots, whereby the re Hector can bemoved up and down before the face of the ground glass, and its free endmoved toward and away from the latter, substantially as described.

In witness whereof I aflix my signati'lro in presence of two witnesses.

DAVID E. SllAltltlC'VlS.

Nitnesses:

(/IIAS. E. Knonnnn, J12,

t. G. DU 1301s.

